Parent task with 0 subtasks

Hi, Using TaskAngel I created a task with some subtasks. Then I removed the subtasks. Now on Toodledo I have a task with a parent icon and no subtasks. If I hover over it, the text is "Click icon to hide 0 subtasks". I did set the children parameter to zero in Edit Task.
This matters because I can't move the task to be a subtask in another group. When doing it from TaskAngel I get an error message saying the Parent ID is invalid. When doing it from the browser I get the 'can't drag' icon.
Any ideas?
Thanks,
Andrew

If you can give us the id number of the task (in a support ticket if you wish) we can look at it and see if we can see what caused the problem. Or, if you can reproduce this via some certain steps, that would allow us to fix the bug.

To fix it, you could probably add another subtask and then remove it, which will refresh the count, but if you can allow us to look at it before you do this, it would give us some useful info.